Assertion: When we change the unit of measurerment of a quantity its numerical value changes.
Reason: Smaller the unit of measurement smaller is its numerical value.

Options

A. if both assertion and reason are true reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation fo assertion.
C. If assertion is true but reaso is false.
D. IF both assertion and reason are false.

Answer

C

Explanation

if `u_(1) and u_(2)` be the units to measure a quantity Q and `n_(1) and n_(2)` be the numerical values respectively then we know that `Q=n_(1)u_(1)=n_(2)u_(2)`. Since the quantity Q does not change irrespective of the units used to measure it `Q=`constant. So nu=constant`impliesnprop(1)/(u)` i.e., smaller the unit of measurement, greater is the corresponding numerical value.